US 12,258,510 B2
Liquid crystal medium
Sven Christian Laut, Darmstadt (DE); and Fisher (Shuo) Yu, Shanghai (CN)
Assigned to MERCK PATENT GMBH, Darmstadt (DE)
Appl. No. 18/014,035
Filed by MERCK PATENT GMBH, Darmstadt (DE)
PCT Filed Jun. 30, 2021, PCT No. PCT/EP2021/067953
§ 371(c)(1), (2) Date Dec. 30, 2022,
PCT Pub. No. WO2022/003001, PCT Pub. Date Jan. 6, 2022.
Claims priority of application No. 20183842 (EP), filed on Jul. 3, 2020.
Prior Publication US 2023/0295511 A1, Sep. 21, 2023
Int. Cl. G02F 1/1333 (2006.01); C09K 19/30 (2006.01); C09K 19/58 (2006.01)
CPC C09K 19/3003 (2013.01) [C09K 19/586 (2013.01); C09K 2019/3004 (2013.01)] 22 Claims
 
1. A liquid crystal medium comprising 2% to 16% of one or more compounds of formula I

OG Complex Work Unit Chemistry
in which
R1 denotes H, a straight chain alkyl or alkoxy radical having 1 to 15 C atoms, or a branched alkyl or alkoxy radical having 3 to 15 C atoms, where one or more CH2 groups in these radicals may each be replaced, independently of one

OG Complex Work Unit Chemistry
another, by —C═C—,—CF2O—,—OCF2—,—CH═CH—,—O—,—CO—O—or —O—CO— in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be replaced by halogen,

OG Complex Work Unit Chemistry
denotes

OG Complex Work Unit Chemistry
Y1 denotes H or CH3,
n is 0 or 1, and
v is 1, 2, 3, 4, 5, or 6;
and
one or more compounds of formula IV

OG Complex Work Unit Chemistry
in which
R41 denotes alkyl having 1 to 7 C atoms or alkenyl having 2 to 7 C atoms, and
R42 denotes alkyl having 1 to 7 C atoms or alkoxy having 1 to 6 C atoms or alkenyl having 2 to 7 C atoms:
and
8% to 15% of one or more compounds of formula IIA,
and
5 to 30% of one or more compounds of formula IID,
and
optionally one or more compounds of formulae IIB and/or IIC,

OG Complex Work Unit Chemistry
in which
R2A, R2B, R2C
and R2D each, independently of one another, denote H, an alkyl radical having 1 to 15 C atoms or an alkenyl radical having 2 to 15 C atoms, which is un-substituted, monosubstituted by CN or CF3 or at least monosubstituted by halogen, where one or more CH2 groups in these radicals may be replaced by —O—,—S—,

OG Complex Work Unit Chemistry
—C═C—,—CF2O—,—OCF2—,—OC—O— or —O—CO— in such a way that O atoms are not linked directly to one another,
L1 to L4 each, independently of one another, denote F, Cl, CF3 or CHF2,
Y denotes H, F, Cl, CF3, CHF2 or CH3,
Z2, Z2B and Z2D each, independently of one another, denote a single bond,—CH2CH2—,—CH═CH—,—CF2O—,—OCF2—,—CH2O—,—OCH2—,—COO—,—OCO—,—C2F4—,—CF═CF— or —CH═CHCH2O—,
p denotes 0, 1 or 2,
q denotes 0 or 1, and
V denotes an integer from 1 to 6,
wherein the compounds of formula I are excluded from formula IID; and
one or more compounds of formula III-3

OG Complex Work Unit Chemistry
in which
R11, R12 identically or differently, denote H, an alkyl or alkoxy radical having 1 to 15 C atoms, in which one or more CH2 groups in these radicals are optionally replaced, independently of one another, by —C═C—,—CF2O—, —OCF2—,—CH═CH—,

OG Complex Work Unit Chemistry
—O—,—CO—O— or —O—CO— in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be replaced by halogen;
wherein the compounds of formulae L and IV are present at a total concentration of 35 to 75%.